Production of patterned india rubber



May 4 1926. 1,583,545

' fillehtws #F 'OOd I Patented May 4, 19 26.

I .lJ N' IV T ED STATES PATENT OFF-ICE.-

i manna!" moon rum WALTER mums SYDEE, or cnArnL-EN- E-ramn,

ENGLAND. a

rnonuc'rzou or' ra'rrnnunn INDIA; RUBBER.

Application filed October 16, 1924. Serial No. 744,060.

This invention has for its object the ready and convenient production of pattern efiectsin rubber goods such as tiles, sheets, tubes and other articles.

Our invention comprises the productionof a patterned effect in indiarubbergoods by consolidating into a mass of the des1red size and shape, sections or portions of ri1bber ofany desired colour and shape the:

said sections being coated with metal before such consolidation and the said coating removed from the exposed faces or surfaces of the sections after said consolidation.

In one convenient application of our invention, unvulcanized' rubber sheets of the desired colour are cut up into small sections which may be of regular or irregular shapes. 'The mixed coloured sections are then dip ed or immersed in a solution consisting o a'mixture of rubber solution and metallic powder, such as aluminium powder, whereby the various sections become coated with an aluminium or other metal coating. The mass is then consolidated into sheet, tile or other form by suitable presses or by passing the same "through a roller or mangle type "of; machine. The sheets or tiles, are vulcanized and their faces finished by -grinding or otherwise removing the surface of the same whereby the metal coating is taken therefrom and the varie ated coloured pattern ,is exposed, each co cured section having a border or vein like surround ofthe aluminium or other metal, whereby desirable ornamental effects are obtained.

It will of course be understood that we may, if desired, coat some of the rubbersections with a metallic powder anduse other sections which are uncoated so as to'vary the final pattern produced.

We may, in some cases, provide a sheet Faoon and or solid base iece or backing with a covering of the mixed colouredv sectlons instead of making the wholeof the sheet of the mixed coloured sections.

The accompanying drawing illustrates face of a circular slab of rubber made up from a consolidated mass of metal coated rubber sections of various shapes, and colours, the metal being removed from the face of the sections. after such consolidation.

The reference letter 1 indicates colouredthe rubber sections and the letter I) the metal border or veins surrounding the sections.

We claim o 1. The process of producing a mosaic effeet in indiarubber goods, consisting in coating a number of pieces of rubber with metal, uniting said coated pieces to form a unit of the required size and shape, and subsequently removing the metal coating from the top of said unitthereby exposing the rubbersurface of the constituent pieces, aforesaid; and the uppcr'edges of the portions of the said coatlng on the contiguous sides of said pieces. a

2. The process of producing a mosaic effeet in indiarubber goods, consisting in cutting rubber sheets of different colours into small' sections, dipping saidsections in a metallic powder solution thereby giving them a metallic coating, unitin said metal coated sections into one unit, an subsequently removing the metal coating from the top of said unit thereby exposing the rubber surface of the respective sections and the upper edges of the portions of the coating on the contiguous sides of said sections.

3. The process of producing a mosaic ef- I feet in indiarubber goods, consisting in cutting sheet rubber into small sections, dippingsome of the said-sections in a metallic powder solution thereby giving them a metallic coating, uniting said metal coated sections with a number of uncoated sections to form one unit, and subse uently removing the metal from the top o said coated sec .tions leaving exposed the upper edges of the metal coating on the sides of the sections.

4. The process of producing a mosaic etfeet in indiarubber goods, consisting in cutper edges of the metal coating on the sides ting rubber sheets into smallvsections,idipof the sections and providing a rubber base ping said sections in a metallic powder soon the under surface of said unit. 1 lution therebygiving them a metallic coat- In testimony whereof we have signed our 5 ing, uniting said metal coated sections into names to this specification. one unit, removing the metal coating from HERBERT FROOD. the top of said unit leaving exposed the up- WALTER RICHARD SYDEE. 

